Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo", uses=false) Using package Buildings with version 7.0.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo) Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Running command: translateModel(Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised") translateModel(Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001037/0.001037, allocations: 111.3 kB / 15.23 MB, free: 0.6602 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00111/0.00111, allocations: 198.8 kB / 16.14 MB, free: 6.656 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.46/1.46, allocations: 205.1 MB / 222 MB, free: 4.746 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo): time 1.574/1.574, allocations: 251.6 MB / 0.5088 GB, free: 3.301 MB / 414.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.001217/0.001217, allocations: 67.91 kB / 0.6216 GB, free: 1.984 MB / 0.5137 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.4958/0.497, allocations: 104.7 MB / 0.7238 GB, free: 13.17 MB / 0.545 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised): time 0.1678/0.6649, allocations: 159.5 MB / 0.8796 GB, free: 13.07 MB / 0.7012 GB Notification: Performance of NFInst.instExpressions: time 0.002753/0.6677, allocations: 1.833 MB / 0.8813 GB, free: 11.23 MB / 0.7012 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0002617/0.6679, allocations: 7.938 kB / 0.8814 GB, free: 11.22 MB / 0.7012 GB Notification: Performance of NFTyping.typeComponents: time 0.0005193/0.6685, allocations: 131.2 kB / 0.8815 GB, free: 11.09 MB / 0.7012 GB Notification: Performance of NFTyping.typeBindings: time 0.001084/0.6696, allocations: 0.4941 MB / 0.882 GB, free: 10.6 MB / 0.7012 GB Notification: Performance of NFTyping.typeClassSections: time 0.0008658/0.6705, allocations: 346.4 kB / 0.8823 GB, free: 10.26 MB / 0.7012 GB Notification: Performance of NFFlatten.flatten: time 0.00269/0.6732, allocations: 3.476 MB / 0.8857 GB, free: 6.777 MB / 0.7012 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0008369/0.674, allocations: 0.7645 MB / 0.8864 GB, free: 5.996 MB / 0.7012 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001309/0.6754, allocations: 0.9025 MB / 0.8873 GB, free: 5.09 MB / 0.7012 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0007007/0.6761, allocations: 0.7272 MB / 0.888 GB, free: 4.359 MB / 0.7012 GB Notification: Performance of NFPackage.collectConstants: time 8.276e-05/0.6762, allocations: 36 kB / 0.8881 GB, free: 4.324 MB / 0.7012 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001286/0.6775, allocations: 0.8107 MB / 0.8888 GB, free: 3.512 MB / 0.7012 GB Notification: Performance of NFScalarize.scalarize: time 0.0002503/0.6777, allocations: 290.8 kB / 0.8891 GB, free: 3.227 MB / 0.7012 GB Notification: Performance of NFVerifyModel.verify: time 0.0005129/0.6782, allocations: 0.505 MB / 0.8896 GB, free: 2.719 MB / 0.7012 GB Notification: Performance of NFConvertDAE.convert: time 0.001295/0.6795, allocations: 1.386 MB / 0.891 GB, free: 1.328 MB / 0.7012 GB Notification: Performance of FrontEnd - DAE generated: time 6.402e-06/0.6796, allocations: 3.938 kB / 0.891 GB, free: 1.324 MB / 0.7012 GB Notification: Performance of FrontEnd: time 2.104e-06/0.6796, allocations: 3.938 kB / 0.891 GB, free: 1.32 MB / 0.7012 GB Notification: Performance of Transformations before backend: time 1.238e-05/0.6796, allocations: 3.938 kB / 0.891 GB, free: 1.316 MB / 0.7012 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 126 * Number of variables: 126 Notification: Performance of Generate backend data structure: time 0.002098/0.6817, allocations: 1.443 MB / 0.8924 GB, free: 15.81 MB / 0.7169 GB Notification: Performance of prepare preOptimizeDAE: time 4.308e-05/0.6817, allocations: 12.03 kB / 0.8924 GB, free: 15.8 MB / 0.7169 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0007384/0.6825, allocations: 178.5 kB / 0.8926 GB, free: 15.62 MB / 0.7169 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001112/0.6836, allocations: 0.806 MB / 0.8934 GB, free: 14.76 MB / 0.7169 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.523e-05/0.6836, allocations: 45 kB / 0.8934 GB, free: 14.71 MB / 0.7169 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.14e-05/0.6837, allocations: 56 kB / 0.8935 GB, free: 14.66 MB / 0.7169 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001104/0.6848, allocations: 0.7965 MB / 0.8942 GB, free: 13.79 MB / 0.7169 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.793e-05/0.6849, allocations: 15.86 kB / 0.8943 GB, free: 13.77 MB / 0.7169 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.207e-05/0.6849, allocations: 24 kB / 0.8943 GB, free: 13.75 MB / 0.7169 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.382e-05/0.685, allocations: 12 kB / 0.8943 GB, free: 13.73 MB / 0.7169 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0008175/0.6858, allocations: 0.5344 MB / 0.8948 GB, free: 13.2 MB / 0.7169 GB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.003528/0.6893, allocations: 4.587 MB / 0.8993 GB, free: 8.23 MB / 0.7169 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0006707/0.69, allocations: 415 kB / 0.8997 GB, free: 7.816 MB / 0.7169 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000351/0.6904, allocations: 244.7 kB / 0.8999 GB, free: 7.574 MB / 0.7169 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0002964/0.6907, allocations: 198.2 kB / 0.9001 GB, free: 7.344 MB / 0.7169 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0004887/0.6912, allocations: 293.1 kB / 0.9004 GB, free: 7.039 MB / 0.7169 GB Notification: Performance of pre-optimization done (n=31): time 2.334e-06/0.6912, allocations: 0 / 0.9004 GB, free: 7.039 MB / 0.7169 GB Notification: Performance of matching and sorting (n=31): time 0.001377/0.6926, allocations: 0.6271 MB / 0.901 GB, free: 6.406 MB / 0.7169 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.583e-05/0.6926, allocations: 81.11 kB / 0.9011 GB, free: 6.309 MB / 0.7169 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001271/0.6939, allocations: 1.118 MB / 0.9022 GB, free: 5.172 MB / 0.7169 GB Notification: Performance of collectPreVariables (initialization): time 4.97e-05/0.694, allocations: 45.64 kB / 0.9022 GB, free: 5.121 MB / 0.7169 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003916/0.6944, allocations: 488.2 kB / 0.9027 GB, free: 4.637 MB / 0.7169 GB Notification: Performance of collectInitialBindings (initialization): time 7.863e-05/0.6945, allocations: 110.5 kB / 0.9028 GB, free: 4.527 MB / 0.7169 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001552/0.6946, allocations: 110 kB / 0.9029 GB, free: 4.414 MB / 0.7169 GB Notification: Performance of setup shared object (initialization): time 0.0001089/0.6947, allocations: 325.9 kB / 0.9032 GB, free: 4.09 MB / 0.7169 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003563/0.6951, allocations: 214.6 kB / 0.9034 GB, free: 3.879 MB / 0.7169 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0006114/0.6957, allocations: 0.5253 MB / 0.9039 GB, free: 3.219 MB / 0.7169 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0008481/0.6966, allocations: 0.6268 MB / 0.9045 GB, free: 2.512 MB / 0.7169 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.621e-06/0.6966, allocations: 4 kB / 0.9045 GB, free: 2.508 MB / 0.7169 GB Notification: Performance of matching and sorting (n=54) (initialization): time 0.001158/0.6978, allocations: 0.7202 MB / 0.9052 GB, free: 1.773 MB / 0.7169 GB Notification: Performance of prepare postOptimizeDAE: time 4.046e-05/0.6978, allocations: 33.7 kB / 0.9053 GB, free: 1.734 MB / 0.7169 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.907e-06/0.6978, allocations: 4 kB / 0.9053 GB, free: 1.73 MB / 0.7169 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.926e-05/0.6979, allocations: 8 kB / 0.9053 GB, free: 1.723 MB / 0.7169 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004301/0.6983, allocations: 111.8 kB / 0.9054 GB, free: 1.613 MB / 0.7169 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.646e-05/0.6983, allocations: 12.34 kB / 0.9054 GB, free: 1.602 MB / 0.7169 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007082/0.699, allocations: 91.47 kB / 0.9055 GB, free: 1.512 MB / 0.7169 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.213e-05/0.6991, allocations: 43.86 kB / 0.9055 GB, free: 1.469 MB / 0.7169 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0006758/0.6998, allocations: 0.4967 MB / 0.906 GB, free: 0.9688 MB / 0.7169 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0005233/0.7003, allocations: 495.5 kB / 0.9065 GB, free: 360 kB / 0.7169 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.4506/1.151, allocations: 0.5498 MB / 0.907 GB, free: 183.3 MB / 0.7169 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 8.856e-06/1.151, allocations: 2.031 kB / 0.907 GB, free: 183.3 MB / 0.7169 GB Notification: Performance of matching and sorting (n=54) (initialization_lambda0): time 0.001656/1.153, allocations: 0.6447 MB / 0.9076 GB, free: 183.2 MB / 0.7169 GB Notification: Performance of prepare postOptimizeDAE: time 4.129e-05/1.153, allocations: 34.27 kB / 0.9077 GB, free: 183.2 MB / 0.7169 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.147e-05/1.153, allocations: 5.969 kB / 0.9077 GB, free: 183.2 MB / 0.7169 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.564e-05/1.153, allocations: 8.406 kB / 0.9077 GB, free: 183.2 MB / 0.7169 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004111/1.153, allocations: 103.9 kB / 0.9078 GB, free: 183.2 MB / 0.7169 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.733e-05/1.153, allocations: 13.28 kB / 0.9078 GB, free: 183.2 MB / 0.7169 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0008827/1.154, allocations: 88.34 kB / 0.9079 GB, free: 183.2 MB / 0.7169 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.349e-05/1.154, allocations: 25.83 kB / 0.9079 GB, free: 183.2 MB / 0.7169 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 24 * Number of states: 0 () * Number of discrete variables: 5 (pulse_p.count,$PRE.pulse_p.count,pulse_p.T_start,$PRE.pulse_p.T_start,$whenCondition1) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (53): * Single equations (assignments): 52 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0002201/1.154, allocations: 217.9 kB / 0.9081 GB, free: 183 MB / 0.7169 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001335/1.154, allocations: 99.97 kB / 0.9082 GB, free: 183 MB / 0.7169 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001037/1.156, allocations: 492.7 kB / 0.9087 GB, free: 182.9 MB / 0.7169 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.442e-06/1.156, allocations: 4.25 kB / 0.9087 GB, free: 182.9 MB / 0.7169 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.744e-06/1.156, allocations: 4.484 kB / 0.9087 GB, free: 182.9 MB / 0.7169 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 7.945e-06/1.156, allocations: 6.234 kB / 0.9087 GB, free: 182.9 MB / 0.7169 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002317/1.158, allocations: 1.384 MB / 0.9101 GB, free: 182.3 MB / 0.7169 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.78e-06/1.158, allocations: 2.562 kB / 0.9101 GB, free: 182.3 MB / 0.7169 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002657/1.158, allocations: 64.19 kB / 0.9101 GB, free: 182.3 MB / 0.7169 GB Notification: Performance of postOpt tearingSystem (simulation): time 8.405e-06/1.158, allocations: 4.031 kB / 0.9101 GB, free: 182.3 MB / 0.7169 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.785e-05/1.158, allocations: 9.516 kB / 0.9101 GB, free: 182.3 MB / 0.7169 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 7.404e-06/1.158, allocations: 3.109 kB / 0.9101 GB, free: 182.3 MB / 0.7169 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 7.905e-06/1.158, allocations: 3.172 kB / 0.9101 GB, free: 182.3 MB / 0.7169 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0009356/1.159, allocations: 0.6073 MB / 0.9107 GB, free: 182 MB / 0.7169 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002969/1.16, allocations: 208.8 kB / 0.9109 GB, free: 181.8 MB / 0.7169 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001156/1.16, allocations: 13.61 kB / 0.9109 GB, free: 181.8 MB / 0.7169 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004436/1.16, allocations: 48.39 kB / 0.911 GB, free: 181.8 MB / 0.7169 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001179/1.16, allocations: 38.95 kB / 0.911 GB, free: 181.8 MB / 0.7169 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.826e-05/1.16, allocations: 9.969 kB / 0.911 GB, free: 181.8 MB / 0.7169 GB Notification: Performance of sorting global known variables: time 0.001268/1.162, allocations: 0.7917 MB / 0.9118 GB, free: 181.5 MB / 0.7169 GB Notification: Performance of sort global known variables: time 1e-07/1.162, allocations: 0 / 0.9118 GB, free: 181.5 MB / 0.7169 GB Notification: Performance of remove unused functions: time 0.001424/1.163, allocations: 408.8 kB / 0.9122 GB, free: 181.5 MB / 0.7169 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 0 () * Number of discrete variables: 3 ($whenCondition1,pulse_p.T_start,pulse_p.count) * Number of discrete states: 1 (pulse_p.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (31): * Single equations (assignments): 29 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.0004911/1.163, allocations: 172.9 kB / 0.9124 GB, free: 181.4 MB / 0.7169 GB Notification: Performance of simCode: created initialization part: time 0.001649/1.165, allocations: 0.8076 MB / 0.9132 GB, free: 181.1 MB / 0.7169 GB Notification: Performance of simCode: created event and clocks part: time 2.875e-06/1.165, allocations: 6.453 kB / 0.9132 GB, free: 181.1 MB / 0.7169 GB Notification: Performance of simCode: created simulation system equations: time 0.000414/1.166, allocations: 205.6 kB / 0.9134 GB, free: 181 MB / 0.7169 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002055/1.168, allocations: 454.2 kB / 0.9138 GB, free: 181 MB / 0.7169 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003449/1.171, allocations: 2.036 MB / 0.9158 GB, free: 179.9 MB / 0.7169 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.000976/1.172, allocations: 1.176 MB / 0.9169 GB, free: 179.1 MB / 0.7169 GB Notification: Performance of simCode: alias equations: time 0.001552/1.174, allocations: 421.2 kB / 0.9173 GB, free: 179.1 MB / 0.7169 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002429/1.174, allocations: 74.47 kB / 0.9174 GB, free: 179 MB / 0.7169 GB Notification: Performance of SimCode: time 2.334e-06/1.174, allocations: 0.5312 kB / 0.9174 GB, free: 179 MB / 0.7169 GB Notification: Performance of Templates: time 0.02432/1.198, allocations: 16.54 MB / 0.9335 GB, free: 166.4 MB / 0.7169 GB make -j1 -f Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.makefile (rm -f Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.pipe ; mkfifo Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.pipe ; head -c 1048576 < Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.pipe >> ../files/Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.sim & ./Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.pipe 2>&1)